[Autofill] Support "importing" verified profiles and credit cards.

components/autofill/browser/autofill_profile.cc

Index: components/autofill/browser/autofill_profile.cc
diff --git a/components/autofill/browser/autofill_profile.cc b/components/autofill/browser/autofill_profile.cc
index 976cee9fa4418fe28b02e3d1198b808ea2117da0..a5be4169fb627dd0f851ded925f35d8843c261c0 100644
--- a/components/autofill/browser/autofill_profile.cc
+++ b/components/autofill/browser/autofill_profile.cc
@@ -505,6 +505,10 @@ bool AutofillProfile::IsSubsetOf(const AutofillProfile& profile,
 
 void AutofillProfile::OverwriteWithOrAddTo(const AutofillProfile& profile,
                                            const std::string& app_locale) {
+  // Verified profiles should never be overwritten with unverified data.
+  DCHECK(!IsVerified() || profile.IsVerified());
+  set_origin(profile.origin());
+
   FieldTypeSet field_types;
   profile.GetNonEmptyTypes(app_locale, &field_types);